MS2 v3.0 voltage problem
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
MS2 v3.0 voltage problem
I am having problem with my MS2 v3.0 board. When I power it with my megastim v2.21 only IG led lights up. I have tried to re-solder components but nothing seems to help. When board is powered with stim, resistors R31 and R35 heaten up very much. I found some other topic which had instructions testing voltages for short circuits in board. I checked those points with multimeter and I found that there is no +5V in the left banded end of D19. Anybody has idea what could be wrong?
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: MS2 v3.0 voltage problem
Could you post the FULL RESULTS of the voltage test you did?
Re: MS2 v3.0 voltage problem
Here are the results:
I am powering megastim with Vivanco switching power supply. It is giving +11.85V
S12 = 11.73V
S12C = 10.89V
center leg of Q9 = 11.72V
center leg of Q12 = 11.72V
left (non-banded ) end of D3 = 11.73V
left leg of U5 = 10.15V
left (banded) end of D9 = 10.16V
S5 = 4.89V
two +5V holes in the proto area = 4.89V
right (non-banded) end of D9 = 4.89V
right leg of U5 = 4.99V
left (banded) end of D19 = 0.01V
CPU pin 1 = 4.88V
CPU pin 20 = 4.88V
CPU pin 31 = 4.88V
I am powering megastim with Vivanco switching power supply. It is giving +11.85V
S12 = 11.73V
S12C = 10.89V
center leg of Q9 = 11.72V
center leg of Q12 = 11.72V
left (non-banded ) end of D3 = 11.73V
left leg of U5 = 10.15V
left (banded) end of D9 = 10.16V
S5 = 4.89V
two +5V holes in the proto area = 4.89V
right (non-banded) end of D9 = 4.89V
right leg of U5 = 4.99V
left (banded) end of D19 = 0.01V
CPU pin 1 = 4.88V
CPU pin 20 = 4.88V
CPU pin 31 = 4.88V
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: MS2 v3.0 voltage problem
Is D19 getting hot? Does anything change if you de-solder it?